Automatic trip-motion



M. BERNAUDIN.

AUTOMATIC TRIP MOTION.

APPLICATION FILED mum, 1921.

1,385,241 Patented July 19, 1921.

INVENTOR mv I gig MQUEIC'E Bzwvnuaw er 9 W 2 A TTORNEYS UNITED .STATES PATENT OFFICE.

AUTOMATIC 'rnrravrorrroir.

Application filed March 3, 1921.

To all iii/mm it 'ilmy concern:

Be it known that I, MAURICE BnnNAuoIN, a citizen of France, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Automatic 'l1;-ip-Motion, of which the following is a full, clear, and exact description.

This invention relates to automatic trip motions, and has particular reference to a trip motion applicable to use with printing presses and the like.

An object of the invention is to provide a simple, compact and readily attachable means for an ordinary printing press whereby the paper-feed roll may be moved to a non-printing position whenever, for one reason or another, the paper is not gripped and moved to the printing position.

Another object resides in the provision of means whereby the trip lever may be ositively moved by a simple apparatus w rich can he applied very readily to any type of press without very materially altering the construction thereof.

I A further object resides in the particular construction and arrangement of parts which are hereinafter described and claimed and shown in the accompanying drawings.

In printing presses it sometimes happens that sheets of paper are not gripped, al.- though presented for gripping, and if the ordinary movements ensue thereafter the face of the roll which ordinarily carries the paper is pressed against the printing roll and receives the ink on its face and is, therefore, marred. This reception of ink on the face of the papercarrying roll causes subsequent sheets of paper to be discolored and marred on their rear faces. It is, therefore, necessary to provide simple means whereby the paper-feeding roll will be moved out of normal position whenever the sheet of paper is not gripped and the roll moves by the printing surface. I have provided an electrical circuit which is connected with the paper feeding roll and the paper gripping means thereon in a simple and eflicient manner whereby if the paper gripping means has not received a sheet of paper the circuit is closed to actuate the tripping lever, whereas if the paper gripping means has received a sheet of paper the circuit is broken through the ripping means, and the actuating means fir the tripping lever Specification of Letters Patent.

Patented J uly l 9, 1.921.

Serial No. 449,557.

not operated. This electrical means and circuit is attachable to any type of printing press and eoi'ngerates with the paper gripping means without any substantial alteration thereof.

The invention is illustrated. in the drawings, in which-- Figure l is a diagrammatic reywesentm tion of the attachn'ient;

Fig. 9. a detail the;

Fig. 3 is a plan view in Fig. 2.

The preferred embodiment of my inven tion, as shown in the drawings, is applied to a cylinder printing press in. which there is provided a, rotary paper-feed roll 1 mounted on a suitable shaft '2. This roll, along one portion of its surface, is provided with a recess portion 8 in which a paper gripper and a paper ejector or shoofly 5 are disposed in a manner well known in the art. .thS shown in Figs. 2 and 3 particularly, the paper gripper and the shoofly are mounted on suitable shafts, such as 6 and 7, which may be actuated by any suitable means periodically during the cycle of operations of the paper-feeding roll. The shoofly is suitably insulated from the shaft 7, as in- (heated in the drawings. it sheet of paper, such as 8, is adapted to be grii )ped betw cn the outer edges of the shoofly 5 and toe gripper 4 and carried around by the roll 1 to be presented in contact with the printing surface, which may be another roll or a flat plate.

As shown in Fig. 3 nirticularly, the end of the shoofly 5 is provided with a plate 9 which has a laterally extending portion 10 adapted to extend in a plane underneath the end of the gripper 4, so that when a sheet of paper such as 8 is not gripped between the shoofiy and the gripper the two will make metallic contact. Disposed adjacent the gripper 4 and the shoofiy 5, and either carried by the roll 1 or mounted on some stationary support, is a shaft 11 carrying a spring contact finger 12 which is adapted when the shoofiy 5 is in the position shown in Fig. 2 to make contact therewith. This contact finger 12 is connected by a wire 13 to an electromagnet 1 and a battery 15, the other side of which is connected electrically in any suitable manner by a wire 16 to the roll 1. A magnet 14.- is adapted to actuate the lever 17 normally held up by a spring iof; and of the parts shown 18, so that the movement of the lever in a manner well known in the art will cause the tripping of the paper-feed roller on the movement of the printing surface so that the two surfaces will not come in contact when they are tripped.

This magnet 14, it will be observed, is energized when the circuit is closed by reason of the contact between the end of the gripper 4: and the shoofly 5. If, however, a sheet of paper 8 has been received between the ends of these members, the contact between their ends is not made and the circuit, therefore, is not energized. In this instance, the paper is carried around and into contact with the printing surface. In other respects the operation of the press is unchanged.

It is observed that this simple device can be attached to any suitable type of press with substantially no material modification in the parts thereof. The laterally projecting plate portion 9 on the shoofiy can be made in the form of an attachment to be slipped on over the edge of the shoofly, if desired, although this specific construction is not shown. By reason of this arrangement I provide a simple, economically constructed, readily attachable and highly eflicient device to effect the tripping of the proper parts of the press whenever the paper is not being properly fed through the machine.

What I claim is:

1. A tripping device for printing presses, which comprises a roll, paper gripping means disposed thereon, paper ejecting means disposed thereon, and means attached to the paper ej ecting means to make metallic contact betweenthe gripping means and the ejecting means when a sheet of paper is not gripped.

2. A tripping device for printing presses, which comprises a roll, paper gripping means disposed thereon, paper ejecting means disposed thereon, means cooperating therewith to make metallic contact between the gripping means and the ejecting means when a sheet of paper is not received thereby, a tripping lever, electrical means for actuating said tripping lover, a. circuit associated with said electrical means, and a contact device in said circuit and adapted to contact with the paper-ejecting means.

3. An attachment for printing presses having a tripping device, a paper feeding roll, a paper gripping lever, and a paper ejecting lever, which comprises an electrical contact disposed to bear against the paper ejecting lever, an electrical device disposed adjacent the tripping lever and adapted to actuate the same, a source of current, av circuit connecting the contact device, the electrical means, the source of current and the paper feeding roll, and a metallic extension on the paper ejector normally disposed adjacent the end of the paper gripping means and adapted to make contact therebctween upon the failure of the gripping means to retain the sheet of paper on the roll.

4. An attachment for printing presses having a paper-feeding roll, a paper-gripping lever and a paper-ejecting lever, which comprises a metallic attachment to one of said levers adapted to extend in the path of the other so as to make metallic contact therebetwcen when a sheet of paper is not grasped by the gripper.

MAURICE BERNAUDIN. 

